Article ID Journal Published Year Pages File Type
1499817 Scripta Materialia 2011 4 Pages PDF
Abstract

The plastic deformation of several orientations of a monocrystalline NiTi shape memory alloy was investigated via nanoindentation. The onset of plasticity, indicated by a pop-in, was used to determine the activation volume for each orientation. Unlike other reports, we found the activation volume to be dependent on orientation; in particular, the (1 0 0) orientation had an activation volume double that of the (1 1 0) and (1 1 1) orientations. This is attributable to different recoverable transformation strain behaviors. These observations illuminate the deformation mechanisms that may exist in materials that undergo phase transformations.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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